An investigation of D+→τ+ν

P. Rubin*, C. Cawlfield, B. I. Eisenstein, I. Karliner, D. Kim, N. Lowrey, P. Naik, C. Sedlack, M. Selen, E. J. White, J. Wiss, M. R. Shepherd, D. Besson, T. K. Pedlar, D. Cronin-Hennessy, K. Y. Gao, D. T. Gong, J. Hietala, Y. Kubota, T. KleinB. W. Lang, R. Poling, A. W. Scott, A. Smith, Sean A Dobbs, Z. Metreveli, Kamal K Seth, Amiran Tomaradze, P. Zweber, J. Ernst, H. Severini, S. A. Dytman, W. Love, V. Savinov, O. Aquines, Z. Li, A. Lopez, S. Mehrabyan, H. Mendez, J. Ramirez, G. S. Huang, D. H. Miller, V. Pavlunin, B. Sanghi, I. P.J. Shipsey, B. Xin, G. S. Adams, M. Anderson, J. P. Cummings, I. Danko, J. Napolitano, Q. He, J. Insler, H. Muramatsu, C. S. Park, E. H. Thorndike, T. E. Coan, Y. S. Gao, F. Liu, M. Artuso, S. Blusk, J. Butt, J. Li, N. Menaa, R. Mountain, S. Nisar, K. Randrianarivony, R. Redjimi, R. Sia, T. Skwarnicki, S. Stone, J. C. Wang, K. Zhang, S. E. Csorna, G. Bonvicini, D. Cinabro, M. Dubrovin, A. Lincoln, D. M. Asner, K. W. Edwards, R. A. Briere, I. Brock, J. Chen, T. Ferguson, G. Tatishvili, H. Vogel, M. E. Watkins, J. L. Rosner, N. E. Adam, J. P. Alexander, K. Berkelman, D. G. Cassel, J. E. Duboscq, K. M. Ecklund, R. Ehrlich, L. Fields, L. Gibbons, R. Gray, S. W. Gray, D. L. Hartill, B. K. Heltsley, D. Hertz, C. D. Jones, J. Kandaswamy, D. L. Kreinick, V. E. Kuznetsov, H. Mahlke-Krüger, T. O. Meyer, P. U.E. Onyisi, J. R. Patterson, D. Peterson, J. Pivarski, D. Riley, A. Ryd, A. J. Sadoff, H. Schwarthoff, X. Shi, S. Stroiney, W. M. Sun, T. Wilksen, M. Weinberger, S. B. Athar, R. Patel, V. Potlia, H. Stoeck, J. Yelton

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

We test whether or not the τ lepton manifests the same couplings as the μ lepton by investigating the relative decay rates in purely leptonic D+ meson decays. We use 281pb-1 of data accumulated at the ψ(3770) resonance with the CLEO-c detector, to limit B(D+→τ+ν)<2.1×10-3 at 90% confidence level (C.L.), thus allowing us to place the first upper limit on the ratio R=Γ(D+→τ+ν)/Γ(D+→μ+ν). The ratio of R to the standard model expectation of 2.65 then is <1.8 at 90% C.L., consistent with the prediction of lepton universality.

Original languageEnglish (US)
Article number112005
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume73
Issue number11
DOIs
StatePublished - 2006

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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